Process for the manufacture of cotton yarn and improved product



i V Patented Nov. 19, 1929 UNITED STATES PATENT OFFICE I EUGENE '0.GWALTNEY, F LAUREL HILL, NORTH CAROLINA PIBOCESQ I63 THE H'ANUFAGLURE OFCOTTON YARN AND IMPROVED PRODUCT Io Drawing.

My invention relates to an improved process for the manufacture ofcotton yarn, and to as been from to 20%. The theory has.

been that the improvement in breaking strength of combed yarn overcarded. yarn has been due to the fact that the short fibres wereeliminated in the combing rocess. My experience has shown thatimprovement in reak is due, not so much to the elimination of shortfibres but, rather, to a more perfect parallelization of the fibre inthe comber.

I have proven that'a comber using coarser needles with a wider spacingbetween the needles taking out a larger percentage .of

waste will not give a breakin any way equal to that produce on a comberin which the needles are fine and closely set taking out awastepercentage of not over 2%,

thus demonstrating that the increase in break is due rather to theperfect strai htenin' of the, fibre than to the elimination 0% shortfiire In In process, the combed silver used is'produce with'the smallestpossible amount of fibres removed and i for the purposes ofstraightening and parallelizing the fibres and improved cleanliness.

In-my improved rocess and product, I

combine both combed and carded fibres into slivers, and in that wayovercome the unevenness due to the piecings inherent in the combedsliver process re erred to and get a more uniform distribution of thefibres, thus taking advantage of, and utilizing, the more uniformdistribution of the fibres well known to exist in the ordinary cardedsliver, and also the more perfect parallelized fibres in combed sliverwhlch assists in the subsequent drafting of the carded sliver in themanufacture of the finishedyarn.

The blendin of the more uniform and evenly carded iver with the combedsliver tends to eliminate the unevenness and to disstrength of thecarded yarn or cord is sevenstrength in named society Application filedm a, 1921. Serial No. 204,54

creased over the breakfilg strength of either the combed or the cardedyarn alone. In other words, the blending of the two gives a strongeryarn than either of the two are when spun separately. For instance'oncarded one and three-sixteenth inch cotton spun and twisted in a tirefabric cord, the breaking teen and one-half pounds; of the combed, itwas eighteen for the blended, that is the combed and carded, eighteenand one-half pounds. These tests were all made by a member of theAmerican Society for Testing Materials, who is also a member of the TireFabricCommitte'e, with the latest approved testing-machines correctedfor moisture regain, the tests all having been made in the laboratogwhere the atmospheric conditions were m ntained to give the standardregain of six and one-half per cent, all in accordance-with theregulations as laid down by the abovefor testing cord fabric. Tests ofthe single yarns give practically the same 80 result.

In the foregoing process, as now operating, the percentage of waste onthe combed fibres is held down from ten per cent to less than two percent, which latter waste percentage makes a yarn cost but very littlemore than a carded yarn, while in strength it is much superior to acombed yarn.

Also I get'the following improvement on carded yarns: Increasingcleanliness and greater lustre due to the combing operation,

better. drafting qualities in subsequent proc- 7 ed and combed cottonslivers or rovings are ,give an increased strength to res uct.

combined in the formation of a thread, yarn, twine or card, to give anincreased strength to resulting product. 1

2. An im roved process in which the carded and com ed cotton sliversor-rovings are combined in the formation of a thread, yarn, twine orcord in which the waste from the combed sliver does not exceed ten fercent, to

ting prod- 3. A thread, yarn, twine or cord composed of'a blending ofcombed and carded cotton fibers to give an increased strength toresulting product.

4. A thread, yarn, twine or cord composed of a blending of combed andcarded cotton slivers, in which the waste from the combed sliver is heldso low as to not materially increase the cost of resulting productthough resulting in greater strength. i

5. As a new process, the blending together of carded and combed cottonslivers or fibers.

6. As'a new .process of manufacture, the

blending together of carded and combed cot- 1 ton slivers or fibers intheformation of a thread, yarn, twine or cord.

In testimony whereof I aflix my si ature. EUGENE C. GWALT Y.

